The Dundee-based firm - which last week issued a profits warning on the back of manufacturing faults that have now been corrected - has signed up DenPro under a non-exclusive deal to sell the technology in its home market.
DenPro is set to demonstrate the device at the British Dental Association's annual conference, which opens on Thursday in Manchester.
The company will use a network of regional dental distributors in the UK, which between them have around 18 sales representatives.
Andrew Haughton, director of DenPro, said that the device would fit in with current trends in dentistry, where practitioners are trying to focus on prevention as well as treatment.
He added: "Early and accurate detection of dental disease is a fundamental requirement of modern dentistry as we move towards a more preventive orientation of dental care. CarieScan Pro enables the dentist to achieve these goals."
3D, which transferred from the Plus stock exchange to Aim in November, had named Clark Dental as its exclusive UK distributor in July 2009.
A 3D spokeswoman yesterday said that the exclusive period had now come to an end but that Clark Dental would continue to distribute the CarieScan device in the UK.